ACQUISITIONS, DIVESTITURES AND DISCONTINUED OPERATIONS - ACQUISITION ACTIVITY (Details) - USD ($) $ in Millions	1 Months Ended
Feb. 29, 2020	Mar. 31, 2020
TTI [Member]
Business Acquisition [Line Items]
Ownership percentage in consolidated entity	100.00%
Oncor Electric Delivery Company LLC. [Member]
Business Acquisition [Line Items]
Ownership percentage held by noncontrolling owners	80.45%	80.45%
Ownership percentage in consolidated entity	19.75%
TTHC [Member] \| TTI [Member]
Business Acquisition [Line Items]
Ownership percentage in consolidated entity	100.00%
TTHC [Member] \| Oncor Electric Delivery Company LLC. [Member]
Business Acquisition [Line Items]
Ownership percentage in consolidated entity	19.75%
Oncor Electric Delivery Company LLC Additional Acquisition [Member] \| Sempra Texas Intermediate Holding Company LLC [Member] \| Oncor Electric Delivery Company LLC. [Member]
Business Acquisition [Line Items]
Acquired percentage interest	0.1975%
Acquired receivables	$ 6
Cash consideration	23
Fair value of notes receivable acquired	7
Investment in TTHC	$ 16
TTHC [Member] \| Sempra Texas Intermediate Holding Company LLC [Member]
Business Acquisition [Line Items]
Additional ownership percentage	1.00%

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Equity Investment

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- Definition

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Notes Receivable

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the gross contractual amounts receivable, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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- Definition

Percentage of voting equity interests acquired in a business combination achieved in stages, including equity interests in the acquiree held by the acquirer immediately before the acquisition date and acquired at the acquisition date.

+ References

No definition available.

+ Details

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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- Definition

Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

+ References

No definition available.

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